Anchor.



iUrNiTE STATES `Patented Julie 2,1903.

WILLIAM A. DUNCANSON, OF BROCKTON, MASSACHUSETTS.

ANCHOR.

srnctrrcrcn formingpart pf Letters Patent No.-'730,009, dated June 2,1903.

Application filed December 13, 1902. Serial No. 135.040. (No model.)

To L7/Z whom it' may cov/0eme;

Be it known thatl, WILLIAMA. DuNcANsoN, a citizen of the United States, and aresident of the city of Brockton, in the county of Plyniouth and State of lvlassachusetts, have invented a new and Improved Anchor, of which the following is a full, clear, and exact description.

This invention relates to improvements in ships anchors; and the object is to provide a yielding connection betweenthe anchor and the anchor chain or cable, thus preventing the breaking of the chain or cable by sudden shocks or pulls due to the motion of a vessel while at anchor.

I will describe an anchor embodying my invention and then point out the novel features in the appendedclaims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in Which similar characters of reference indicate corresponding parts in both of the figures.

Figure 1 is a plan view, partly in section, of an anchor embodying` my invention; and

Fig. 2 is a longitudinal section through theshank thereof. 1

Referring tothe drawings, 1 designates the shank of the anchor2 the arm thereof, and 3 the flukes,having swinging connection With the arm. The shank 1 is tubular, and movable in the shank is a rod il, on the outer end of which is a ring 5, towhich a chain or cable (i is to be attached. This rod et is movable through an opening in a partition 7, secured in the shank at about its center. On the lower end of the rod is a piston S, and a piston 9 is also connected to the rod above the partition 7. These pistons are perforated for a purpose which Will be hereinafter described.

Arranged in the compartment in which the piston S operates is a liquid 10, and in the compartment in which the piston J operates is a liquid 11. l The liquid may be oil or similar material not subject to freezing Also arranged in the compartments are springs 12 and 13, the' spring 12 abutting against the partition? and piston S, while the spring 13 abut-s against the piston 9 and the end wall of the shank.

Secured to the shank at the end and at opposite sides are cylinders 14. for containing liquid, and operating in thesecylinders are perforated pistons 15, the stems 16 of which slide through openings'in the end closure ,of the cylinder and connect with a cross-head 17, attached to thefrod .4, and springs 18 are arranged between the pistons and the end closure. These auxiliary pistons and springs serve to check the continuous'draft.on the main pistons and springs-that is, when the auxiliary devices are completely compressed the main devices will not-be fully compressed,

so that a'colnplete elastic cushion is obtained. Byperforating the pistons th e bearing thereon Will be relieved to some extent, as the liquid Will pass through said perforations as the pistons move upward; The four springs act in conjunction in throwing back the pistons upon the slacking up of the chain or cable. The liquid in the chambers is to perform the hydraulic action when press ure is brought to bear.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- M 1. An anchor havinga tubular shank, a cushioned piston therein, and means for connectingthe piston to a chain or cable.

2. An anehorhavinga tubular shank,a rod movable inl said shank, a piston on said rod, and a spring surrounding the rod, the said spring bearing atA one end against the piston and at the other'end against a fixed part in the shank, substantially as specified.

3. An anchor having a tubular shank, a rod movable in said "shank, a perforated piston on said rod, a spring surrounding the rod and engaging `at one end with the piston and at the other end With a fixed part in the shank, and a liquid in-the shank, substantially as specified.

4. An anchor-having a tubular shank, a

partition arranged in said shank and having ICO the end of the shank7 and pistons in Sayid eylindeis having connection with the rod.

I connection with the anchor elmin or cable,

and auxiliary cushioned pistons having con (5. Anzmchoi: havin :L tubulin-shank, :L rod l nection With the chain o1' Gable, substantially I5 movable in the shank, n pstonon said rod, a I as specified.

5 sp1-ing between said piston and n fixed pzut I In testimony whereof: I have signed my in the shank, cylinders on the end of the naine to this specification in the presence of shank, pistons opel-ating in said cylinders, l two subscribing witnesses. stems extended from the )istons to eonneel T tions with the rod, and spiiln pressing npon XVHLIAM A' DUB ("ANbON to said pistons, substantially as specified. lVitnesses:

7. An anchor having :L tubular shank, :L J. HARRY POOLE, Cushioned piston in said shank :1nd having HENRY l?. PARKER. 

